1ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru/* 2ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ****************************************************************************** 38393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * Copyright (C) 2007-2013, International Business Machines Corporation 485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and others. All Rights Reserved. 5ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru ****************************************************************************** 6ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * File CHNSECAL.CPP 8ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru * 985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Modification History: 1085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 1185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Date Name Description 1285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 9/18/2007 ajmacher ported from java ChineseCalendar 1385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ***************************************************************************** 14ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru */ 1585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru#include "chnsecal.h" 17ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 1885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#if !UCONFIG_NO_FORMATTING 1985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 2085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "umutex.h" 2185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include <float.h> 2285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "gregoimp.h" // Math 2385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "astro.h" // CalendarAstronomer 248393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius#include "unicode/simpletz.h" 2585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "uhash.h" 2685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#include "ucln_in.h" 2785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 2885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Debugging 2985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#ifdef U_DEBUG_CHNSECAL 3085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho# include <stdio.h> 3185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho# include <stdarg.h> 3285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic void debug_chnsecal_loc(const char *f, int32_t l) 3385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 3485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fprintf(stderr, "%s:%d: ", f, l); 3585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 3685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 3785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic void debug_chnsecal_msg(const char *pat, ...) 3885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 3985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho va_list ap; 4085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho va_start(ap, pat); 4185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho vfprintf(stderr, pat, ap); 4285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho fflush(stderr); 4385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 4485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// must use double parens, i.e.: U_DEBUG_CHNSECAL_MSG(("four is: %d",4)); 4585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#define U_DEBUG_CHNSECAL_MSG(x) {debug_chnsecal_loc(__FILE__,__LINE__);debug_chnsecal_msg x;} 4685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#else 4785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#define U_DEBUG_CHNSECAL_MSG(x) 4885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 4985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 5085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 5185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// --- The cache -- 5254dcd9b6a06071f647dac967e9e267abb9410720Craig Corneliusstatic UMutex astroLock = U_MUTEX_INITIALIZER; // pod bay door lock 53103e9ffba2cba345d0078eb8b8db33249f81840aCraig Corneliusstatic icu::CalendarAstronomer *gChineseCalendarAstro = NULL; 54103e9ffba2cba345d0078eb8b8db33249f81840aCraig Corneliusstatic icu::CalendarCache *gChineseCalendarWinterSolsticeCache = NULL; 55103e9ffba2cba345d0078eb8b8db33249f81840aCraig Corneliusstatic icu::CalendarCache *gChineseCalendarNewYearCache = NULL; 568393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusstatic icu::TimeZone *gChineseCalendarZoneAstroCalc = NULL; 5759d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic icu::UInitOnce gChineseCalendarZoneAstroCalcInitOnce = U_INITONCE_INITIALIZER; 5885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 5985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 6085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The start year of the Chinese calendar, the 61st year of the reign 6185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * of Huang Di. Some sources use the first year of his reign, 6285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * resulting in EXTENDED_YEAR values 60 years greater and ERA (cycle) 6385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * values one greater. 6485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 6585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t CHINESE_EPOCH_YEAR = -2636; // Gregorian year 6685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 6785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 6885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The offset from GMT in milliseconds at which we perform astronomical 6985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * computations. Some sources use a different historically accurate 7085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * offset of GMT+7:45:40 for years before 1929; we do not do this. 7185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 728393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusstatic const int32_t CHINA_OFFSET = 8 * kOneHour; 7385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 7585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Value to be added or subtracted from the local days of a new moon to 7685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * get close to the next or prior new moon, but not cross it. Must be 7785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * >= 1 and < CalendarAstronomer.SYNODIC_MONTH. 7885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 7985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t SYNODIC_GAP = 25; 8085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 8185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 8285bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_CDECL_BEGIN 8385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic UBool calendar_chinese_cleanup(void) { 8485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarAstro) { 8585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarAstro; 8685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = NULL; 8785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 8885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarWinterSolsticeCache) { 8985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarWinterSolsticeCache; 9085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarWinterSolsticeCache = NULL; 9185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 9285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (gChineseCalendarNewYearCache) { 9385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho delete gChineseCalendarNewYearCache; 9485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarNewYearCache = NULL; 9585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 968393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (gChineseCalendarZoneAstroCalc) { 978393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius delete gChineseCalendarZoneAstroCalc; 988393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius gChineseCalendarZoneAstroCalc = NULL; 998393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 10059d709d503bab6e2b61931737e662dd293b40578ccornelius gChineseCalendarZoneAstroCalcInitOnce.reset(); 10185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return TRUE; 10285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 10385bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_CDECL_END 10485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_NAMESPACE_BEGIN 10685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 10885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Implementation of the ChineseCalendar class 10985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 11085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 11185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 11285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Constructors... 11385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 11485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 11585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 11685bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoCalendar* ChineseCalendar::clone() const { 11785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return new ChineseCalendar(*this); 11885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 11985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 12085bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::ChineseCalendar(const Locale& aLocale, UErrorCode& success) 1218393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius: Calendar(TimeZone::createDefault(), aLocale, success), 1228393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius isLeapYear(FALSE), 1238393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fEpochYear(CHINESE_EPOCH_YEAR), 1248393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fZoneAstroCalc(getChineseCalZoneAstroCalc()) 1258393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius{ 1268393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. 1278393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius} 1288393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 1298393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig CorneliusChineseCalendar::ChineseCalendar(const Locale& aLocale, int32_t epochYear, 1308393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius const TimeZone* zoneAstroCalc, UErrorCode &success) 1318393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius: Calendar(TimeZone::createDefault(), aLocale, success), 1328393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius isLeapYear(FALSE), 1338393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fEpochYear(epochYear), 1348393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fZoneAstroCalc(zoneAstroCalc) 13585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 13685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly. 13785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 13885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 13985bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::ChineseCalendar(const ChineseCalendar& other) : Calendar(other) { 14085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapYear = other.isLeapYear; 1418393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fEpochYear = other.fEpochYear; 1428393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fZoneAstroCalc = other.fZoneAstroCalc; 14385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 14485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 14585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::~ChineseCalendar() 14685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 14785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 14885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 14985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst char *ChineseCalendar::getType() const { 15085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return "chinese"; 15185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 15285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 15359d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic void U_CALLCONV initChineseCalZoneAstroCalc() { 15459d709d503bab6e2b61931737e662dd293b40578ccornelius gChineseCalendarZoneAstroCalc = new SimpleTimeZone(CHINA_OFFSET, UNICODE_STRING_SIMPLE("CHINA_ZONE") ); 15559d709d503bab6e2b61931737e662dd293b40578ccornelius ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 15659d709d503bab6e2b61931737e662dd293b40578ccornelius} 15759d709d503bab6e2b61931737e662dd293b40578ccornelius 1588393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusconst TimeZone* ChineseCalendar::getChineseCalZoneAstroCalc(void) const { 15959d709d503bab6e2b61931737e662dd293b40578ccornelius umtx_initOnce(gChineseCalendarZoneAstroCalcInitOnce, &initChineseCalZoneAstroCalc); 1608393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius return gChineseCalendarZoneAstroCalc; 1618393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius} 1628393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 16385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 16485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Minimum / Maximum access functions 16585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------------- 16685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 16885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hostatic const int32_t LIMITS[UCAL_FIELD_COUNT][4] = { 16985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Minimum Greatest Least Maximum 17085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Minimum Maximum 17185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 83333, 83333}, // ERA 17285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 60, 60}, // YEAR 17385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 0, 0, 11, 11}, // MONTH 17485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 50, 55}, // WEEK_OF_YEAR 17585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH 17685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 29, 30}, // DAY_OF_MONTH 17785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 1, 1, 353, 385}, // DAY_OF_YEAR 17885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK 17985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -1, -1, 5, 5}, // DAY_OF_WEEK_IN_MONTH 18085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM 18185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR 18285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY 18385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE 18485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND 18585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND 18685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET 18785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET 18885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY 18985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL 19085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR 19185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY 19285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY 19385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 0, 0, 1, 1}, // IS_LEAP_MONTH 19485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho}; 19585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 19685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 19785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 19885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho* @draft ICU 2.4 19985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho*/ 20085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const { 20185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return LIMITS[field][limitType]; 20285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 20385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 20485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 20585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//---------------------------------------------------------------------- 20685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Calendar framework 20785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//---------------------------------------------------------------------- 20885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 20985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 21085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Implement abstract Calendar method to return the extended year 21185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * defined by the current fields. This will use either the ERA and 21285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * YEAR field as the cycle and year-of-cycle, or the EXTENDED_YEAR 21385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * field as the continuous year count, depending on which is newer. 21485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 21585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 21685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetExtendedYear() { 21785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t year; 21885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newestStamp(UCAL_ERA, UCAL_YEAR, kUnset) <= fStamp[UCAL_EXTENDED_YEAR]) { 21985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho year = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1 22085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 22185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cycle = internalGet(UCAL_ERA, 1) - 1; // 0-based cycle 2228393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius // adjust to the instance specific epoch 2238393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius year = cycle * 60 + internalGet(UCAL_YEAR, 1) - (fEpochYear - CHINESE_EPOCH_YEAR); 22485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 22585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return year; 22685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 22785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 22885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 22985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar method to return the number of days in the given 23085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * extended year and month. 23185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 23285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Note: This method also reads the IS_LEAP_MONTH field to determine 23385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * whether or not the given month is a leap month. 23485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 23585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 23685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleGetMonthLength(int32_t extendedYear, int32_t month) const { 23785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t thisStart = handleComputeMonthStart(extendedYear, month, TRUE) - 23885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho kEpochStartAsJulianDay + 1; // Julian day -> local days 23985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t nextStart = newMoonNear(thisStart + SYNODIC_GAP, TRUE); 24085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return nextStart - thisStart; 24185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 24285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 24385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 24485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to compute several fields specific to the Chinese 24585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * calendar system. These are: 24685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 24785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <ul><li>ERA 24885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>YEAR 24985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>MONTH 25085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>DAY_OF_MONTH 25185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>DAY_OF_YEAR 25285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <li>EXTENDED_YEAR</ul> 25385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 25485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * The DAY_OF_WEEK and DOW_LOCAL fields are already set when this 25585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * method is called. The getGregorianXxx() methods return Gregorian 25685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * calendar equivalents for the given Julian day. 25785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 25885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Compute the ChineseCalendar-specific field IS_LEAP_MONTH. 25985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 26085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 26185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/) { 26285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 26385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho computeChineseFields(julianDay - kEpochStartAsJulianDay, // local days 26485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho getGregorianYear(), getGregorianMonth(), 26585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho TRUE); // set all fields 26685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 26785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 26885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 26985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Field resolution table that incorporates IS_LEAP_MONTH. 27085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 27185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst UFieldResolutionTable ChineseCalendar::CHINESE_DATE_PRECEDENCE[] = 27285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 27385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 27485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_MONTH, kResolveSTOP }, 27585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, UCAL_DAY_OF_WEEK, kResolveSTOP }, 27685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 27785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 27885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, UCAL_DOW_LOCAL, kResolveSTOP }, 27985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 28085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 28185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_YEAR, kResolveSTOP }, 28285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_MONTH, UCAL_IS_LEAP_MONTH, kResolveSTOP }, 28385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveSTOP } 28485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho }, 28585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { 28685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_YEAR, kResolveSTOP }, 28785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_WEEK_OF_MONTH, kResolveSTOP }, 28885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { UCAL_DAY_OF_WEEK_IN_MONTH, kResolveSTOP }, 28985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP }, 29085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP }, 29185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho { kResolveSTOP } 29285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho }, 29385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho {{kResolveSTOP}} 29485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho}; 29585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 29685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 29785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to add IS_LEAP_MONTH to the field resolution 29885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * table. 29985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 30085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 30185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoconst UFieldResolutionTable* ChineseCalendar::getFieldResolutionTable() const { 30285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return CHINESE_DATE_PRECEDENCE; 30385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 30485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 30585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 30685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the Julian day number of day before the first day of the 30785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * given month in the given extended year. 30885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 30985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>Note: This method reads the IS_LEAP_MONTH field to determine 31085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * whether the given month is a leap month. 31185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param eyear the extended year 31285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param month the zero-based month. The month is also determined 31385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * by reading the IS_LEAP_MONTH field. 31485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return the Julian day number of the day before the first 31585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * day of the given month and year 31685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 31785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 31885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::handleComputeMonthStart(int32_t eyear, int32_t month, UBool useMonth) const { 31985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 32085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ChineseCalendar *nonConstThis = (ChineseCalendar*)this; // cast away const 32185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 32285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // If the month is out of range, adjust it into range, and 32385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // modify the extended year value accordingly. 32485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 0 || month > 11) { 32585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double m = month; 32685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho eyear += (int32_t)ClockMath::floorDivide(m, 12.0, m); 32785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month = (int32_t)m; 32885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 32985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 3308393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int32_t gyear = eyear + fEpochYear - 1; // Gregorian year 33185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t theNewYear = newYear(gyear); 33285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon = newMoonNear(theNewYear + month * 29, TRUE); 33385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 33485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t julianDay = newMoon + kEpochStartAsJulianDay; 33585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 33685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Save fields for later restoration 33785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t saveMonth = internalGet(UCAL_MONTH); 33885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t saveIsLeapMonth = internalGet(UCAL_IS_LEAP_MONTH); 33985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 34085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Ignore IS_LEAP_MONTH field if useMonth is false 34185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t isLeapMonth = useMonth ? saveIsLeapMonth : 0; 34285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 34385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 34485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->computeGregorianFields(julianDay, status); 34585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) 34685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return 0; 34785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 34885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // This will modify the MONTH and IS_LEAP_MONTH fields (only) 34985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->computeChineseFields(newMoon, getGregorianYear(), 35085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho getGregorianMonth(), FALSE); 35185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 35285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month != internalGet(UCAL_MONTH) || 35385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapMonth != internalGet(UCAL_IS_LEAP_MONTH)) { 35485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon = newMoonNear(newMoon + SYNODIC_GAP, TRUE); 35585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho julianDay = newMoon + kEpochStartAsJulianDay; 35685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 35785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 35885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->internalSet(UCAL_MONTH, saveMonth); 35985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho nonConstThis->internalSet(UCAL_IS_LEAP_MONTH, saveIsLeapMonth); 36085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 36185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return julianDay - 1; 36285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 36385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 36485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 36585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 36685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 36785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 36885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 36985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::add(UCalendarDateFields field, int32_t amount, UErrorCode& status) { 37085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho switch (field) { 37185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho case UCAL_MONTH: 37285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (amount != 0) { 37385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dom = get(UCAL_DAY_OF_MONTH, status); 37485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 37585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t day = get(UCAL_JULIAN_DAY, status) - kEpochStartAsJulianDay; // Get local day 37685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 37785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t moon = day - dom + 1; // New moon 37885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho offsetMonth(moon, dom, amount); 37985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 38085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 38185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho default: 38285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho Calendar::add(field, amount, status); 38385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 38485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 38585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 38685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 38785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 38885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 38985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 39085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 39185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::add(EDateFields field, int32_t amount, UErrorCode& status) { 39285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho add((UCalendarDateFields)field, amount, status); 39385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 39485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 39585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 39685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Override Calendar to handle leap months properly. 39785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @stable ICU 2.8 39885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 39985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::roll(UCalendarDateFields field, int32_t amount, UErrorCode& status) { 40085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho switch (field) { 40185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho case UCAL_MONTH: 40285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (amount != 0) { 40385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dom = get(UCAL_DAY_OF_MONTH, status); 40485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 40585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t day = get(UCAL_JULIAN_DAY, status) - kEpochStartAsJulianDay; // Get local day 40685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 40785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t moon = day - dom + 1; // New moon (start of this month) 40885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 40985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Note throughout the following: Months 12 and 1 are never 41085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // followed by a leap month (D&R p. 185). 41185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 41285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Compute the adjusted month number m. This is zero-based 41385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // value from 0..11 in a non-leap year, and from 0..12 in a 41485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // leap year. 41585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t m = get(UCAL_MONTH, status); // 0-based month 41685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 41785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapYear) { // (member variable) 41885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (get(UCAL_IS_LEAP_MONTH, status) == 1) { 41985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ++m; 42085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 42185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Check for a prior leap month. (In the 42285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // following, month 0 is the first month of the 42385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // year.) Month 0 is never followed by a leap 42485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // month, and we know month m is not a leap month. 42585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // moon1 will be the start of month 0 if there is 42685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // no leap month between month 0 and month m; 42785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // otherwise it will be the start of month 1. 42885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int moon1 = moon - 42985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (int) (CalendarAstronomer::SYNODIC_MONTH * (m - 0.5)); 43085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho moon1 = newMoonNear(moon1, TRUE); 43185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapMonthBetween(moon1, moon)) { 43285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ++m; 43385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 43485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 43585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) break; 43685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 43785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 43885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Now do the standard roll computation on m, with the 43985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // allowed range of 0..n-1, where n is 12 or 13. 44085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t n = isLeapYear ? 13 : 12; // Months in this year 44185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newM = (m + amount) % n; 44285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newM < 0) { 44385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newM += n; 44485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 44585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 44685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (newM != m) { 44785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho offsetMonth(moon, dom, newM - m); 44885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 44985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 45085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 45185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho default: 45285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho Calendar::roll(field, amount, status); 45385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho break; 45485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 45585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 45685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 45785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::roll(EDateFields field, int32_t amount, UErrorCode& status) { 45885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho roll((UCalendarDateFields)field, amount, status); 45985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 46085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 46185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 46285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 46385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Support methods and constants 46485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 46585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 46685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 46785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Convert local days to UTC epoch milliseconds. 4688393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * This is not an accurate conversion in that getTimezoneOffset 4698393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * takes the milliseconds in GMT (not local time). In theory, more 4708393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * accurate algorithm can be implemented but practically we do not need 4718393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * to go through that complication as long as the historical timezone 4728393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * changes did not happen around the 'tricky' new moon (new moon around 4738393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * midnight). 4748393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * 4758393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @param days days after January 1, 1970 0:00 in the astronomical base zone 47685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return milliseconds after January 1, 1970 0:00 GMT 47785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 4788393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusdouble ChineseCalendar::daysToMillis(double days) const { 4798393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius double millis = days * (double)kOneDay; 4808393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (fZoneAstroCalc != NULL) { 4818393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int32_t rawOffset, dstOffset; 4828393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius UErrorCode status = U_ZERO_ERROR; 4838393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fZoneAstroCalc->getOffset(millis, FALSE, rawOffset, dstOffset, status); 4848393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (U_SUCCESS(status)) { 4858393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius return millis - (double)(rawOffset + dstOffset); 4868393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 4878393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 4888393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius return millis - (double)CHINA_OFFSET; 48985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 49085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 49185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 49285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Convert UTC epoch milliseconds to local days. 49385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param millis milliseconds after January 1, 1970 0:00 GMT 4948393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @return days after January 1, 1970 0:00 in the astronomical base zone 49585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 4968393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Corneliusdouble ChineseCalendar::millisToDays(double millis) const { 4978393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (fZoneAstroCalc != NULL) { 4988393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int32_t rawOffset, dstOffset; 4998393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius UErrorCode status = U_ZERO_ERROR; 5008393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius fZoneAstroCalc->getOffset(millis, FALSE, rawOffset, dstOffset, status); 5018393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius if (U_SUCCESS(status)) { 5028393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius return ClockMath::floorDivide(millis + (double)(rawOffset + dstOffset), kOneDay); 5038393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 5048393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius } 5058393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius return ClockMath::floorDivide(millis + (double)CHINA_OFFSET, kOneDay); 50685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 50785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 50885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 50985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Astronomical computations 51085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 51185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 51285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 51385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 51485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the major solar term on or after December 15 of the given 51585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Gregorian year, that is, the winter solstice of the given year. 51685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Computations are relative to Asia/Shanghai time zone. 51785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear a Gregorian year 51885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai of the 51985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * winter solstice of the given year 52085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 52185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::winterSolstice(int32_t gyear) const { 52285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 52385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 52485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cacheValue = CalendarCache::get(&gChineseCalendarWinterSolsticeCache, gyear, status); 52585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 52685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (cacheValue == 0) { 52785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // In books December 15 is used, but it fails for some years 52885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // using our algorithms, e.g.: 1298 1391 1492 1553 1560. That 52985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // is, winterSolstice(1298) starts search at Dec 14 08:00:00 53085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // PST 1298 with a final result of Dec 14 10:31:59 PST 1299. 53185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double ms = daysToMillis(Grego::fieldsToDay(gyear, UCAL_DECEMBER, 1)); 53285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 53385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 53485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 53585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 53685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 53785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 53885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(ms); 53985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate solarLong = gChineseCalendarAstro->getSunTime(CalendarAstronomer::WINTER_SOLSTICE(), TRUE); 54085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 54185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 54285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Winter solstice is 270 degrees solar longitude aka Dongzhi 54385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = (int32_t)millisToDays(solarLong); 54485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho CalendarCache::put(&gChineseCalendarWinterSolsticeCache, gyear, cacheValue, status); 54585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 54685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(U_FAILURE(status)) { 54785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = 0; 54885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 54985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return cacheValue; 55085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 55185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 55285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 55385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the closest new moon to the given date, searching either 55485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * forward or backward in time. 55585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai 55685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param after if true, search for a new moon on or after the given 55785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * date; otherwise, search for a new moon before it 55885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return days after January 1, 1970 0:00 Asia/Shanghai of the nearest 55985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * new moon after or before <code>days</code> 56085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 56185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::newMoonNear(double days, UBool after) const { 56285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 56385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 56485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 56585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 56685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 56785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 56885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(daysToMillis(days)); 56985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate newMoon = gChineseCalendarAstro->getMoonTime(CalendarAstronomer::NEW_MOON(), after); 57085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 57185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 57285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (int32_t) millisToDays(newMoon); 57385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 57485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 57585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 57685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the nearest integer number of synodic months between 57785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * two dates. 57885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param day1 days after January 1, 1970 0:00 Asia/Shanghai 57985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param day2 days after January 1, 1970 0:00 Asia/Shanghai 58085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @return the nearest integer number of months between day1 and day2 58185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 58285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::synodicMonthsBetween(int32_t day1, int32_t day2) const { 58385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho double roundme = ((day2 - day1) / CalendarAstronomer::SYNODIC_MONTH); 58485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (int32_t) (roundme + (roundme >= 0 ? .5 : -.5)); 58585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 58685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 58785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 58885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the major solar term on or before a given date. This 58985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * will be an integer from 1..12, with 1 corresponding to 330 degrees, 59085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 2 to 0 degrees, 3 to 30 degrees,..., and 12 to 300 degrees. 59185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param days days after January 1, 1970 0:00 Asia/Shanghai 59285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 59385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::majorSolarTerm(int32_t days) const { 59485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 59585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_lock(&astroLock); 59685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(gChineseCalendarAstro == NULL) { 59785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro = new CalendarAstronomer(); 59885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ucln_i18n_registerCleanup(UCLN_I18N_CHINESE_CALENDAR, calendar_chinese_cleanup); 59985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 60085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gChineseCalendarAstro->setTime(daysToMillis(days)); 60185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UDate solarLongitude = gChineseCalendarAstro->getSunLongitude(); 60285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho umtx_unlock(&astroLock); 60385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 60485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Compute (floor(solarLongitude / (pi/6)) + 2) % 12 60585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t term = ( ((int32_t)(6 * solarLongitude / CalendarAstronomer::PI)) + 2 ) % 12; 60685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (term < 1) { 60785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho term += 12; 60885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 60985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return term; 61085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 61185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 61285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 61385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return true if the given month lacks a major solar term. 61485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon days after January 1, 1970 0:00 Asia/Shanghai of a new 61585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * moon 61685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 61785bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::hasNoMajorSolarTerm(int32_t newMoon) const { 61885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return majorSolarTerm(newMoon) == 61985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho majorSolarTerm(newMoonNear(newMoon + SYNODIC_GAP, TRUE)); 62085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 62185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 62285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 62385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 62485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Time to fields 62585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 62685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 62785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 62885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return true if there is a leap month on or after month newMoon1 and 62985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * at or before month newMoon2. 6308393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @param newMoon1 days after January 1, 1970 0:00 astronomical base zone 6318393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * of a new moon 6328393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @param newMoon2 days after January 1, 1970 0:00 astronomical base zone 6338393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * of a new moon 63485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 63585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::isLeapMonthBetween(int32_t newMoon1, int32_t newMoon2) const { 63685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 63785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#ifdef U_DEBUG_CHNSECAL 63885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // This is only needed to debug the timeOfAngle divergence bug. 63985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Remove this later. Liu 11/9/00 64085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (synodicMonthsBetween(newMoon1, newMoon2) >= 50) { 64185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho U_DEBUG_CHNSECAL_MSG(( 64285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho "isLeapMonthBetween(%d, %d): Invalid parameters", newMoon1, newMoon2 64385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho )); 64485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 64585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 64685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 64785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (newMoon2 >= newMoon1) && 64885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (isLeapMonthBetween(newMoon1, newMoonNear(newMoon2 - SYNODIC_GAP, FALSE)) || 64985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho hasNoMajorSolarTerm(newMoon2)); 65085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 65185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 65285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 65385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Compute fields for the Chinese calendar system. This method can 65485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * either set all relevant fields, as required by 65585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <code>handleComputeFields()</code>, or it can just set the MONTH and 65685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * IS_LEAP_MONTH fields, as required by 65785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <code>handleComputeMonthStart()</code>. 65885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * 65985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * <p>As a side effect, this method sets {@link #isLeapYear}. 6608393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @param days days after January 1, 1970 0:00 astronomical base zone 6618393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * of the date to compute fields for 66285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear the Gregorian year of the given date 66385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gmonth the Gregorian month of the given date 66485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param setAllFields if true, set the EXTENDED_YEAR, ERA, YEAR, 66585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * DAY_OF_MONTH, and DAY_OF_YEAR fields. In either case set the MONTH 66685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and IS_LEAP_MONTH fields. 66785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 66885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::computeChineseFields(int32_t days, int32_t gyear, int32_t gmonth, 66985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool setAllFields) { 67085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 67185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the winter solstices before and after the target date. 67285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // These define the boundaries of this Chinese year, specifically, 67385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the position of month 11, which always contains the solstice. 67485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // We want solsticeBefore <= date < solsticeAfter. 67585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeBefore; 67685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeAfter = winterSolstice(gyear); 67785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (days < solsticeAfter) { 67885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeBefore = winterSolstice(gyear - 1); 67985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 68085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeBefore = solsticeAfter; 68185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho solsticeAfter = winterSolstice(gyear + 1); 68285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 68385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 68485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the start of the month after month 11. This will be either 68585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the prior month 12 or leap month 11 (very rare). Also find the 68685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // start of the following month 11. 68785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t firstMoon = newMoonNear(solsticeBefore + 1, TRUE); 68885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t lastMoon = newMoonNear(solsticeAfter + 1, FALSE); 68985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t thisMoon = newMoonNear(days + 1, FALSE); // Start of this month 69085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Note: isLeapYear is a member variable 69185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho isLeapYear = synodicMonthsBetween(firstMoon, lastMoon) == 12; 69285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 69385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t month = synodicMonthsBetween(firstMoon, thisMoon); 69485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (isLeapYear && isLeapMonthBetween(firstMoon, thisMoon)) { 69585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month--; 69685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 69785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 1) { 69885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho month += 12; 69985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 70085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 70185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UBool isLeapMonth = isLeapYear && 70285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho hasNoMajorSolarTerm(thisMoon) && 70385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho !isLeapMonthBetween(firstMoon, newMoonNear(thisMoon - SYNODIC_GAP, FALSE)); 70485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 70585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_MONTH, month-1); // Convert from 1-based to 0-based 70685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_IS_LEAP_MONTH, isLeapMonth?1:0); 70785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 70885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (setAllFields) { 70985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7108393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius // Extended year and cycle year is based on the epoch year 7118393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius 7128393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int32_t extended_year = gyear - fEpochYear; 7138393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int cycle_year = gyear - CHINESE_EPOCH_YEAR; 71485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (month < 11 || 71585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho gmonth >= UCAL_JULY) { 7168393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius extended_year++; 7178393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius cycle_year++; 71885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 71985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t dayOfMonth = days - thisMoon + 1; 72085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 7218393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius internalSet(UCAL_EXTENDED_YEAR, extended_year); 72285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 72385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // 0->0,60 1->1,1 60->1,60 61->2,1 etc. 72485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t yearOfCycle; 7258393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius int32_t cycle = ClockMath::floorDivide(cycle_year - 1, 60, yearOfCycle); 72685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_ERA, cycle + 1); 72785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_YEAR, yearOfCycle + 1); 72885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 72985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_DAY_OF_MONTH, dayOfMonth); 73085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 73185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Days will be before the first new year we compute if this 73285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // date is in month 11, leap 11, 12. There is never a leap 12. 73385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // New year computations are cached so this should be cheap in 73485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the long run. 73585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t theNewYear = newYear(gyear); 73685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (days < theNewYear) { 73785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho theNewYear = newYear(gyear-1); 73885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 73985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho internalSet(UCAL_DAY_OF_YEAR, days - theNewYear + 1); 74085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 74185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 74285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 74385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 74485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 74585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// Fields to time 74685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho//------------------------------------------------------------------ 74785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 74885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 74985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Return the Chinese new year of the given Gregorian year. 75085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param gyear a Gregorian year 7518393335b955da7340c9f19b1b4b2d6c0c2c04be7Craig Cornelius * @return days after January 1, 1970 0:00 astronomical base zone of the 75285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Chinese new year of the given year (this will be a new moon) 75385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 75485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::newYear(int32_t gyear) const { 75585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 75685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t cacheValue = CalendarCache::get(&gChineseCalendarNewYearCache, gyear, status); 75785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 75885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (cacheValue == 0) { 75985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 76085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeBefore= winterSolstice(gyear - 1); 76185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t solsticeAfter = winterSolstice(gyear); 76285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon1 = newMoonNear(solsticeBefore + 1, TRUE); 76385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon2 = newMoonNear(newMoon1 + SYNODIC_GAP, TRUE); 76485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t newMoon11 = newMoonNear(solsticeAfter + 1, FALSE); 76585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 76685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (synodicMonthsBetween(newMoon1, newMoon11) == 12 && 76785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho (hasNoMajorSolarTerm(newMoon1) || hasNoMajorSolarTerm(newMoon2))) { 76885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = newMoonNear(newMoon2 + SYNODIC_GAP, TRUE); 76985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 77085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = newMoon2; 77185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 77285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 77385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho CalendarCache::put(&gChineseCalendarNewYearCache, gyear, cacheValue, status); 77485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 77585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if(U_FAILURE(status)) { 77685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho cacheValue = 0; 77785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 77885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return cacheValue; 77985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 78085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 78185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho/** 78285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * Adjust this calendar to be delta months before or after a given 78385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * start position, pinning the day of month if necessary. The start 78485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * position is given as a local days number for the start of the month 78585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * and a day-of-month. Used by add() and roll(). 78685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param newMoon the local days of the first day of the month of the 78785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * start position (days after January 1, 1970 0:00 Asia/Shanghai) 78885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param dom the 1-based day-of-month of the start position 78985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * @param delta the number of months to move forward or backward from 79085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho * the start position 79185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho */ 79285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hovoid ChineseCalendar::offsetMonth(int32_t newMoon, int32_t dom, int32_t delta) { 79385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 79485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 79585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Move to the middle of the month before our target month. 79685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon += (int32_t) (CalendarAstronomer::SYNODIC_MONTH * (delta - 0.5)); 79785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 79885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Search forward to the target month's new moon 79985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho newMoon = newMoonNear(newMoon, TRUE); 80085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 80185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Find the target dom 80285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho int32_t jd = newMoon + kEpochStartAsJulianDay - 1 + dom; 80385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 80485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Pin the dom. In this calendar all months are 29 or 30 days 80585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // so pinning just means handling dom 30. 80685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (dom > 29) { 80785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd-1); 80885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // TODO Fix this. We really shouldn't ever have to 80985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // explicitly call complete(). This is either a bug in 81085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // this method, in ChineseCalendar, or in 81185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Calendar.getActualMaximum(). I suspect the last. 81285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho complete(status); 81385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) return; 81485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (getActualMaximum(UCAL_DAY_OF_MONTH, status) >= dom) { 81585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status)) return; 81685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd); 81785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 81885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } else { 81985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho set(UCAL_JULIAN_DAY, jd); 82085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 82185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 82285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 82385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 82485bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool 82585bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoChineseCalendar::inDaylightTime(UErrorCode& status) const 82685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 82785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // copied from GregorianCalendar 82885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) 82985bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return FALSE; 83085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // Force an update of the state of the Calendar. 83285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ((ChineseCalendar*)this)->complete(status); // cast away const 83385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE); 83585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 83685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho// default century 83885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 83959d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic UDate gSystemDefaultCenturyStart = DBL_MIN; 84059d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic int32_t gSystemDefaultCenturyStartYear = -1; 84159d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic icu::UInitOnce gSystemDefaultCenturyInitOnce = U_INITONCE_INITIALIZER; 84285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 84385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 84485bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUBool ChineseCalendar::haveDefaultCentury() const 84585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 84685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return TRUE; 84785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 84885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 84985bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUDate ChineseCalendar::defaultCenturyStart() const 85085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 85185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return internalGetDefaultCenturyStart(); 85285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 85385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 85485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Hoint32_t ChineseCalendar::defaultCenturyStartYear() const 85585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 85685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho return internalGetDefaultCenturyStartYear(); 85785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 85885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 85959d709d503bab6e2b61931737e662dd293b40578ccorneliusstatic void U_CALLCONV initializeSystemDefaultCentury() 86085bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho{ 86185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // initialize systemDefaultCentury and systemDefaultCenturyYear based 86285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // on the current time. They'll be set to 80 years before 86385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // the current time. 86485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho UErrorCode status = U_ZERO_ERROR; 86585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho ChineseCalendar calendar(Locale("@calendar=chinese"),status); 86659d709d503bab6e2b61931737e662dd293b40578ccornelius if (U_SUCCESS(status)) { 86785bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho calendar.setTime(Calendar::getNow(), status); 86885bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho calendar.add(UCAL_YEAR, -80, status); 86959d709d503bab6e2b61931737e662dd293b40578ccornelius gSystemDefaultCenturyStart = calendar.getTime(status); 87059d709d503bab6e2b61931737e662dd293b40578ccornelius gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status); 87185bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho } 87285bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // We have no recourse upon failure unless we want to propagate the failure 87385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho // out. 87485bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho} 87585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 87659d709d503bab6e2b61931737e662dd293b40578ccorneliusUDate 87759d709d503bab6e2b61931737e662dd293b40578ccorneliusChineseCalendar::internalGetDefaultCenturyStart() const 87859d709d503bab6e2b61931737e662dd293b40578ccornelius{ 87959d709d503bab6e2b61931737e662dd293b40578ccornelius // lazy-evaluate systemDefaultCenturyStart 88059d709d503bab6e2b61931737e662dd293b40578ccornelius umtx_initOnce(gSystemDefaultCenturyInitOnce, &initializeSystemDefaultCentury); 88159d709d503bab6e2b61931737e662dd293b40578ccornelius return gSystemDefaultCenturyStart; 88259d709d503bab6e2b61931737e662dd293b40578ccornelius} 88359d709d503bab6e2b61931737e662dd293b40578ccornelius 88459d709d503bab6e2b61931737e662dd293b40578ccorneliusint32_t 88559d709d503bab6e2b61931737e662dd293b40578ccorneliusChineseCalendar::internalGetDefaultCenturyStartYear() const 88659d709d503bab6e2b61931737e662dd293b40578ccornelius{ 88759d709d503bab6e2b61931737e662dd293b40578ccornelius // lazy-evaluate systemDefaultCenturyStartYear 88859d709d503bab6e2b61931737e662dd293b40578ccornelius umtx_initOnce(gSystemDefaultCenturyInitOnce, &initializeSystemDefaultCentury); 88959d709d503bab6e2b61931737e662dd293b40578ccornelius return gSystemDefaultCenturyStartYear; 89059d709d503bab6e2b61931737e662dd293b40578ccornelius} 89159d709d503bab6e2b61931737e662dd293b40578ccornelius 89285bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoUOBJECT_DEFINE_RTTI_IMPLEMENTATION(ChineseCalendar) 89385bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 89485bf2e2fbc60a9f938064abc8127d61da7d19882Claire HoU_NAMESPACE_END 89585bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho 89685bf2e2fbc60a9f938064abc8127d61da7d19882Claire Ho#endif 897ac04d0bbe12b3ef54518635711412f178cb4d16Jean-Baptiste Queru 898